官网扇形:https://echarts.apache.org/zh/option.html#graphic.elements-sector
const elem = {
id: 'sector-id',
type: 'sector',
shape: {
cx: 8,
cy: 18,
r: 20,
r0: 12,
startAngle: Math.PI * 0.5,
endAngle: Math.PI * 0.8,
clockwise: true
},
style: {
fill: '#1312CD'
},
z: 100
};